plonky2/tooling/web/styles.css

table, th, td {
  border-collapse: collapse;
  border: 2px solid black;
  font-family: sans-serif;
  font-size: 0.8rem;
  letter-spacing: 1px;
}

th, td {
  padding: 5px;
}

.horiz {
  display: inline-block; 
  *display: inline; 
  vertical-align: top;
}